EP3448639B1 - Schneidemechanismus für eine packmaterialumwandlungsmaschine und packmaterialumwandlungsmaschine - Google Patents

Schneidemechanismus für eine packmaterialumwandlungsmaschine und packmaterialumwandlungsmaschine Download PDF

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Publication number
EP3448639B1
EP3448639B1 EP17717995.9A EP17717995A EP3448639B1 EP 3448639 B1 EP3448639 B1 EP 3448639B1 EP 17717995 A EP17717995 A EP 17717995A EP 3448639 B1 EP3448639 B1 EP 3448639B1
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EP
European Patent Office
Prior art keywords
blade
driven
cutting edge
biased
cutting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17717995.9A
Other languages
English (en)
French (fr)
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EP3448639A1 (de
Inventor
Peter L.C. LEMMENS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ranpak Corp
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Ranpak Corp
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Filing date
Publication date
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Priority to EP22188389.5A priority Critical patent/EP4134213A1/de
Publication of EP3448639A1 publication Critical patent/EP3448639A1/de
Application granted granted Critical
Publication of EP3448639B1 publication Critical patent/EP3448639B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
    • B31D5/0039—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads
    • B31D5/0043—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads including crumpling flat material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • B26D1/085—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/22—Safety devices specially adapted for cutting machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
    • B31D5/0039—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0066—Cutting members therefor having shearing means, e.g. shearing blades, abutting blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D2205/00—Multiple-step processes for making three-dimensional articles
    • B31D2205/0005—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads
    • B31D2205/0011—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads including particular additional operations
    • B31D2205/0058—Cutting; Individualising the final products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D2205/00—Multiple-step processes for making three-dimensional articles
    • B31D2205/0005—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads
    • B31D2205/0076—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads involving particular machinery details
    • B31D2205/0082—General layout of the machinery or relative arrangement of its subunits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D2205/00—Multiple-step processes for making three-dimensional articles
    • B31D2205/0005—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads
    • B31D2205/0076—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads involving particular machinery details
    • B31D2205/0094—Safety devices

Definitions

  • This invention relates generally to dunnage conversion machines that convert a sheet stock material into a relatively less dense dunnage product and more particularly to a cutting mechanism for use with such a dunnage conversion machine.
  • a packer In the process of shipping one or more articles from one location to another, a packer typically places some type of dunnage material in a shipping container, such as a cardboard box, along with the article or articles to be shipped.
  • the dunnage material typically is used to wrap the articles, or to partially or completely fill the empty space or void volume around the articles in the container. By filling the void volume, the dunnage restricts or prevents movement of the articles that might lead to damage during the shipment process.
  • the dunnage also can perform blocking, bracing, or cushioning functions.
  • dunnage materials are plastic foam peanuts, plastic bubble pack, air bags, and converted paper dunnage material.
  • converted paper dunnage material is an ecologically-friendly packing material that is recyclable, biodegradable, and composed of a renewable resource.
  • the stock material is typically provided in sheet form in a bulk supply, such as on a roll or in a fan-folded stack. To produce discrete dunnage products, the conversion process requires a separation step where discrete lengths are separated from the stock material before, after, or during conversion.
  • Document EP 2 343 166 A1 discloses a cutter mechanism capable of performing cutting stably with a low risk of causing cutting defects.
  • the cutter mechanism includes: a fixed blade; a movable blade formed in a substantially V-shape when viewed from above, which is provided slideably with respect to the fixed blade; a fixed blade holder that holds the fixed blade with respect to the movable blade in an inclined state so that a cutting edge of the fixed blade forms a predetermined cutting angle with respect to a cutting edge of the movable blade; a holder support member that is orthogonal to a sliding direction of the movable blade and supports the fixed blade holder movably in an orthogonal direction in which the cutting edge of the movable blade moves close to and away from the cutting edge of the fixed blade; and a biasing member that is provided between the fixed blade holder and the holder support member, and biases the fixed blade holder in the orthogonal direction so that the cutting edge of the fixed blade is brought into press-contact with the cutting edge of the
  • the present invention provides an improved dunnage cutting mechanism for use with a dunnage conversion machine.
  • the cutting mechanism is compact, easy to use, and uses a pair of opposed cutting blades to produce a discrete length of dunnage product from sheet stock.
  • the opposed cutting blades are brought into contact with one another during a cutting operation of the cutting mechanism to sever or to cut a discrete length of sheet stock from the substantially continuous bulk supply of sheet stock material.
  • At least one of the opposed blades is self-adjustable relative to the other of the opposed blades to account for wear of one or both of the opposed blades over repeated use.
  • the cutting mechanism also includes a blade guard that is commonly movable with one of the opposed blades to restrict movement of the one of the opposed blades independent from the blade guard during the cutting operation.
  • a cutting mechanism for a dunnage conversion machine that selectively cuts dunnage sheet stock drawable through the cutting as defined in claim 1.
  • a dunnage conversion machine for converting a generally planar, two-dimensional dunnage sheet stock into a relatively increased volume, lower density, three-dimensional dunnage product of a discrete length is provided.
  • the dunnage conversion machine is capable of making converted dunnage products having a three-dimensional shape and increased volume per unit of length as compared to the original unexpanded sheet stock.
  • the dunnage products are formed from at least one ply of sheet stock being generally planar and two-dimensional.
  • an exemplary dunnage conversion machine 20 is shown schematically and includes a stock supply assembly 22, also herein referred to as a supply assembly 22, having a bulk supply of dunnage sheet stock 24.
  • the sheet stock 24 drawn from the bulk supply is also herein referred to as sheet stock material 24.
  • the bulk supply may be arranged on a stand, a cart, or simply supported adjacent the conversion machine 20.
  • the sheet stock 24 of the bulk supply may be of a substantially continuous length, and may be provided either in roll form or as a series of connected, generally rectangular pages in a fan-folded stack. The rolls or stacks can be spliced to successive supplies so as to appear as a never-ending supply to the conversion machine 20.
  • a single roll may include multiple plies co-wrapped into the single roll or a single stack may include multiple plies co-folded into the single stack.
  • Suitable supplies of sheet stock include paper, plastic sheets, or sheets of a combination thereof.
  • the sheet stock also may be laminated or may include a combination of laminated and non-laminated sheet material.
  • An exemplary sheet stock 24 for use with the conversion machine 20 includes either a single-ply or multiply kraft paper. Suitable kraft paper may have various basis weights, such as twenty-pound or forty-pound, for example, and respective plies may have different basis weights.
  • One exemplary sheet stock 24 may be a single-ply kraft paper that is recyclable, biodegradable, and composed of a renewable resource.
  • a conversion assembly 26 for receiving the dunnage sheet stock 24 from the bulk supply is located downstream of the stock supply assembly 22 and converts the sheet stock 24 into a converted sheet stock, such as a relatively less dense strip of dunnage 28.
  • the downstream direction is a direction of advancement of stock material through the dunnage conversion machine 20.
  • An upstream direction is the direction opposite the downstream direction of advancement.
  • An exemplary conversion assembly 26 may be configured to randomly crumple the sheet stock 24 received therein.
  • the sheet stock material 24 may be laterally crumpled across a width of the sheet stock material 24 as it is drawn along its longitudinal length in the downstream direction through the dunnage conversion machine 20. In this way, the sheet stock 24 may be converted into a three-dimensional strip of dunnage 28 having increased volume as compared to the sheet stock 24 of the bulk supply.
  • the converted strip of dunnage 28 is drawn through the conversion machine 20, in a downstream direction into and through a cutting mechanism 34.
  • the substantially continuous strip of dunnage 28 is drawn between opposed blades 30 and 32 of the cutting mechanism 34 for cutting the strip of dunnage 28 into dunnage products 36 of discrete length.
  • the cutting mechanism 34 is located downstream of the conversion assembly 26.
  • stock supply assembly 22, the conversion assembly 26, and the cutting mechanism 34 are illustrated as separated elements of the conversion machine 20 in FIG. 1 , one or more of the stock supply assembly 22, the conversion assembly 26, and the cutting mechanism 34 may be coupled to, integral with, or separate from one another in other embodiments.
  • the cutting mechanism 34 is shown downstream of the stock supply assembly 22 and the conversion assembly 26, the cutting mechanism 34 may be otherwise positioned.
  • the cutting mechanism 34 may be positioned downstream of the stock supply assembly 22 and upstream of the conversion assembly 26, to cut the unconverted sheet stock 24.
  • the cutting mechanism 34 may be located within the conversion assembly 26 such as to cut the sheet stock material during conversion.
  • sheet stock refers to material drawn from the bulk supply.
  • sheet stock may refer to material that is converted, fully or partially, or to non-converted material.
  • the cutting mechanism 34 is provided for cutting the sheet stock, and the state of the sheet stock being cut depends on the location of the cutting mechanism 34 relative to the conversion assembly 26.
  • the cutting mechanism 40 includes a frame 42 and a set of opposed cutting blades 44.
  • the opposed cutting blades 44 include a primary blade 46 and a secondary blade 48.
  • a blade guard 50 is provided to restrict completion of a cutting operation of the cutting mechanism 40 under predetermined conditions, as will be described herein.
  • the depicted frame 42 includes a base 60 fixed to a stationary surface, such as a frame of the conversion machine, for example.
  • the frame 42 may be secured in place by way of fasteners or other means.
  • the frame 42 is configured, such as via guiding members 62, for guiding one or more of the primary blade 46 and the secondary blade 48 as they move relative to one another.
  • At least one guiding member 62 and as illustrated two opposed guiding members 62, extend upwardly from the base 60.
  • the guiding members 62 guide movement of at least one of the blades of the set of opposed cutting blades 44.
  • the guiding members 62 guide the primary blade 46 toward the secondary blade 48 and toward a path of the sheet material between the primary blade 46 and the secondary blade 48.
  • the guiding members 62 are coupled to the base 60, such as by fasteners 64, for example nuts and bolts. Other coupling means may be suitable, or one or more of the guiding members 62 may be integral with the base 60.
  • the depicted guiding members 62 are cylindrical rods, though other suitable shapes may be used in other embodiments. Any suitable number of guiding members, one or more, may be used.
  • Coupling may refer to direct coupling of two components together or indirect coupling using an intermediary component to couple two components together.
  • a stop member 66 is fixed to a distal end 66 of the guiding members 62, opposite a proximal end 68 of the guiding members 62 coupled to the base 60.
  • the stop member 66 limits upward movement of the primary blade 46 in a direction away from the secondary blade 48.
  • Fasteners 72 such as nuts and bolts, may be used to couple the stop member 66 to the guiding members 62.
  • the illustrated stop member 66 is shown as a plate receiving the guiding members 62 through openings in the stop member 66, other constructions may be suitable.
  • one or more of the stop member 66, the guiding members 62, and the base 60 may be integral with one another.
  • the frame 42 is shown including a particular construction in the depicted embodiment of FIGS. 2-5 , it will be understood that other constructions may be suitable. Generally, the frame 42 is configured to support each of the primary blade 46 and the secondary blade 48 for movement relative to one another and relative to a path of the sheet material between the opposed cutting blades 44. Numerous other constructions providing adequate support and guidance for the blades 44 are conceivable.
  • a driven assembly 81 includes the primary blade 46, which is a driven blade 46 that is supported relative to the frame 42, for movement towards the secondary blade 48, via a driven carriage 80 of the driven assembly 81.
  • the driven carriage 80 is received on the guiding members 62 and may be of any suitable shape.
  • the driven blade 46 is attached to the driven carriage 80, such as via suitable fasteners 84. While the illustrated embodiment shows the guiding members 62 extending through respective cavities in the driven carriage 80, the driven carriage 80 may be otherwise slidably coupled to the guiding members 62 in other embodiments.
  • the driven blade 46 is supported for being driven across a path of the sheet stock between the driven blade 46 and the secondary blade 48, which may be herein referred to as a sheet stock path 49.
  • the sheet stock such as a converted strip of dunnage output from a conversion assembly is separated into discrete lengths.
  • the driven blade 46 is supported by the guiding members 62 for movement towards the secondary blade 48, such as linear translation towards the secondary blade 48 and towards the strip path 49.
  • the driven blade 46 acts as a guillotine with respect to the respective sheet material drawn through the cutting mechanism 40. While the driven blade 46 is shown and described as being linearly translatable, the driven blade 46 could be pivotably moved into engagement/ or contact with the secondary blade 48 in other embodiments.
  • the driven blade 46 may be driven manually, such as via an operator applying force to a lever (not shown), for example attached to the driven carriage 80.
  • the driven blade 46 may be linearly translated by other suitable means, such as a linear actuator, pneumatics, hydraulics, etc.
  • a linear actuator such as a linear actuator, pneumatics, hydraulics, etc.
  • an actuation pedal may be pressed by an operator's foot, causing an electromechanical linear actuator to move the driven blade 46 towards the secondary blade 48.
  • the driven blade 46 may be resiliently biased, such as linearly resiliently biased away from the secondary blade 48.
  • a biasing element 88 FIG. 4
  • a biasing element 88 such as a spring, may be coupled between the driven carriage 80 and one of the guiding elements 62 to enable automatic return of the driven blade 46 to its default position.
  • One or more biasing elements 88 may be included, and in some embodiments, the biasing element 88 may be omitted.
  • the driven blade 46 has a leading driven cutting edge 82 for being driven along the driven path 47 to engage a respective cutting edge of the secondary blade 48, to cut the sheet material.
  • the driven cutting edge 82 may be a linear edge, as shown. In other embodiments, the driven cutting edge 82 may be differently shaped.
  • the driven cutting edge 82 is aligned at an angle that is other than orthogonal to the longitudinal direction of translation of the driven blade 46 along the guiding members 62.
  • the driven cutting edge 82 is also disposed at a fixed angle relative to the secondary blade 48, and relative to a plane of movement of the respective cutting edge of the secondary blade 48.
  • a biased assembly 91 includes the secondary blade 48, which is a biased blade 48 that is supported relative to the frame 42, for movement into and through a movement path of the driven blade 46, via a biased carriage 90 of the biased assembly 91.
  • the biased blade 48 is attached to the biased carriage 90, such as via suitable fasteners 106.
  • the biased carriage 90 is coupled, such as pivotably coupled, to the frame 42, and may be of any suitable shape.
  • a suitable fastener 93 such as a pin, extends between the biased carriage 90 and the base 60 of the frame 42, defining a pivot axis 96 of the biased blade 48.
  • the pivot axis 96 is disposed near a lateral end 100 of the biased blade 48, opposite a lateral end 102, and outside of a path 49 of the sheet stock material between the opposed blades 44.
  • a different fastener or a slot a key arrangement may allow for pivotable coupling of the biased blade 48 relative to the frame 42.
  • the pivot axis 96 may be disposed intermediately between opposed lateral ends 100 and 102 of the biased blade 48, rather than near the lateral end 100.
  • the pivot axis may be a moving pivot axis, such as a translating pivot axis.
  • the biased blade 48 is resiliently biased towards the driven blade 46 and against movement away from the driven blade 46.
  • the biased blade 48 is resiliently biased via at least one biasing member 110 towards, and preferably across, a movement path of the driven blade 46, which maybe herein referred to as a driven path 47.
  • two biasing members 110 resiliently urge the biased blade 48 towards the driven path 47.
  • the biasing members 110 such as springs, are supported at least partially by the base 60, and may be coupled to the base 60 or to the biased carriage 90 via suitable fasteners 112.
  • the biased blade 48 has a leading biased cutting edge 92 for engaging the driven cutting edge 82 of the driven blade 46.
  • the biased cutting edge 92 is a linear edge, though may be differently shaped in other embodiments.
  • the biased cutting edge 92 is generally movable in a direction transverse a direction of translation of the driven cutting edge 82 of the driven blade 46.
  • FIGS. 5-11 the cutting mechanism 40 is shown in various stages of use to further illustrate relative movement of the opposed blades 44.
  • FIGS. 6-8 show front views taken through the cross-section A-A of FIG. 5 .
  • FIGS. 9-11 show schematic top-view-illustrations of the blades 46 and 48. In FIGS. 9-11 , the driven blade 46 translates into the page towards biased blade 48.
  • the driven blade 46 In use, the driven blade 46, and particularly the driven cutting edge 82, is movable between a ready position shown in FIGS. 6 and 9 and a cut position shown in FIGS. 8 and 11 .
  • the driven cutting edge 82 also moves through an intermediate position shown in FIGS. 7 and 10 , disposed between the ready position and the cut position of the driven cutting edge 82.
  • the biased cutting edge 92 is biased across a movement path of the driven cutting edge 82, such as across the driven path 47. This is because via the biasing members 110, absent contact with the driven cutting edge 82, the biased cutting edge 92 is aligned at a bias to the driven cutting edge 82 of the driven blade 46.
  • the driven cutting edge 82 and the biased cutting edge 92 are not in contact.
  • the blades 46 and 48 may already be in contact at a ready position of the driven blade 46 in other embodiments.
  • the driven cutting edge 82 As the driven cutting edge 82 is translated into its intermediate position ( FIGS. 7 and 10 ) the driven cutting edge 82 and the biased cutting edge 92 come into contact or engagement with one another. Contact of the driven blade 46 with the biased blade 48 effects movement of the biased blade 48 ( FIGS. 8 and 11 ). The advancing driven blade 46 causes the biased blade 48 to pivot about the pivot axis 96 against a biasing force of the biasing members 110, and in a direction of movement away from the driven blade 46, such as out of the driven path 47.
  • the driven cutting edge 82 and the biased cutting edge 92 engage at a contact point, also herein referred to as a shear point 114 ( FIG. 10 ).
  • the shear point traverses lengths of both of the driven cutting edge 82 and the biased cutting edge 92, as the driven blade 46 moves the biased blade 48 against its direction of bias away from the driven blade 46.
  • the unique arrangement of the driven blade 46 and the biased blade 48 provides a scissor-like cutting or shearing of the sheet stock material drawable between the opposed blades 44.
  • the cutting mechanism 40 generally requires less maintenance, such as replacement of blades. Realignment of one or both of the opposed blades 46 and 48 is minimized, such as when a clean cut is not being made through the sheet stock material.
  • either of the primary blade 46 or the secondary blade 48 could be a driven blade with the other of the blades being a biased blade.
  • the blade guard 50 is generally configured to be coupled between the frame 42 and the driven blade 46. Via this coupling, the blade guard 50 is configured for common movement with the driven blade 46 during at least part of the translation of the driven blade 46 between its ready position ( FIGS. 6 and 14 ) and its cut position ( FIGS. 8 and 16 ). Likewise, via this coupling, the blade guard 50 is also configured for independent movement separate from the driven blade 46 during another part of the stroke of the driven blade 46.
  • the blade guard 50 projects along the driven blade 46 in a longitudinal direction between an upper edge 120 and a lower edge 122, opposite the upper edge 120.
  • the blade guard 50 also projects in a lateral direction between opposed lateral sides 124 and 126.
  • the upper edge 120, lower edge 122 and opposed lateral sides 124 and 126 define an outer periphery 130 of the blade guard.
  • the cutting mechanism 40 includes a pair of opposed laterally-spaced first slot and key arrangements 140 and a pair of opposed laterally-spaced second slot and key arrangements 150. In other embodiments, one or more of either of the first slot and key arrangement 140 and the second slot and key arrangement 150 may be used. While the blade guard 50 is shown as including the slots, the blade guard 50 may include the keys in other embodiments.
  • the first slot and key arrangement 140 slidably couples the blade guard 50 to the frame 42.
  • the blade guard 50 includes a slot 142 that guides movement of the blade guard 50 independent from and relative to the frame 42.
  • a key 144 such as a fastener 144 or other protrusion, is coupled to the frame 42, for example via threading.
  • the fastener 144 is coupled to the stop member 66, but may be coupled to another suitable location of the frame 42 in other embodiments.
  • a washer 146 may be disposed between a head 148 of the fastener 144 and the blade guard 50, to enable efficient sliding of the blade guard 50 relative to the frame 42.
  • the slot 142 is an S-shaped slot having an upper S-portion 147 and a lower S-portion 145 extending generally parallel to the direction of movement of the driven blade 46.
  • An S-transition region 160 of the S-shaped slot 142 is disposed between the upper S-portion 147 and the lower S-portion 145.
  • the upper S-portion 147 and the lower S-portion 145 are laterally offset, such that movement of the key through the transition portion causes the blade guard 50 to laterally shift relative to the frame 42.
  • the shift is in a direction 149 transverse a direction of common movement with the driven blade 46, which is along the driven path 47.
  • the transverse shifting direction 149 is illustrated as orthogonal the driven path 47, though may be otherwise aligned in other embodiments, such as due to alternative slot constructions.
  • the second slot and key arrangement 150 slidably couples the blade guard 50 to the driven assembly 81, generally. More particularly, the blade guard 50 is coupled to the driven blade 46 via the driven carriage 80, and the blade guard includes a slot 152 that guides both common and independent movement of the blade guard relative to the driven blade 46.
  • a key 154 such as a fastener 154 or other protrusion, is coupled to the driven assembly 81, for example via threading. The fastener 154 is coupled to the driven carriage 80, but may be coupled to another suitable location of the driven assembly 81 in other embodiments.
  • a washer 156 may be disposed between a head 158 of the fastener 154 and the blade guard 50, to enable efficient sliding of the blade guard 50 relative to the frame 42.
  • the slot 152 is an inverted L-shaped slot, having a relatively longer L-portion 157 extending along a direction parallel to the translation direction of the driven blade 46.
  • the slot 152 also has a relatively shorter L-portion 155 aligned transverse the relatively longer L-portion 157 and transverse the driven path 47, such as orthogonal to the relatively longer L-portion 157 and orthogonal to the driven path 47.
  • the fastener 154 transitions from the relatively shorter L-portion 155 to a relatively longer L-portion 157.
  • FIGS. 14-16 the cutting mechanism 40 including the blade guard 50 is shown in various stages of use to further illustrate relative movement of the blade guard 50 and the driven blade 46.
  • the blade guard 50 moves between an engaged position ( FIG. 14 ) and a disengaged position ( FIGS. 15 and 16 ).
  • the blade guard 50 moves between an engaged position, where the blade guard 50 is commonly movable with the driven blade 46, to a disengaged position, where the driven blade 46 translates separately from the blade guard 50.
  • the outer periphery 130 of the blade guard 50 projects beyond the driven blade 46, and beyond the driven cutting edge 82 when the blade guard 50 is in the engaged position.
  • the blade guard 50 is located to at least partially cover, and in the depicted embodiment to fully project beyond, the driven cutting edge 82 until the driven cutting edge 82 of the driven blade 46 is within a predetermined distance of the biased cutting edge 92 of the biased blade 48.
  • the predetermined distance may be in the range of about 10 mm to about 3 mm, and preferably may be less than about 5 mm.
  • the blade guard 50 when the driven blade 46 is in the ready position, the blade guard 50 is in the engaged position.
  • the outer periphery 130 of the blade guard 50 projects beyond the driven cutting edge 82, such that the lower edge 122 of the blade guard 50 is nearer the biased blade 48 than the driven blade 46 is with respect to the biased blade 48.
  • the fastener 144 In the engaged position of the glade guard 50, the fastener 144 is in the lower S-portion 145 of the S-shaped slot 142, and the fastener 154 is in the relatively shorter L-portion 155 of the L-shaped slot 152. Because the fastener 154 is coupled in the relatively shorter L-portion 155 of the L-shaped slot 152, the blade guard 50 translates along with the driven blade 46 as the driven blade 46 is translated in the driven direction 47. Accordingly, the L-shaped slot 154 is shaped to maintain the common movement of the blade guard 50 and the driven blade 42 during at least part of the cutting operation.
  • the fastener 144 moves through the lower S-portion 145 of the S-shaped slot 142, towards the upper S-portion 147.
  • the fastener 144 continues towards the S-transition region 160 of the S-shaped slot 142, between the lower S-portion 145 and the upper S-portion 147.
  • the driven blade 46 is driven into the intermediate position.
  • the blade guard 50 is caused to transversely shift along the shifting direction 149 to its disengaged position.
  • the fastener 154 moves relative to the blade guard 50 from the relatively shorter L-portion 147 of the L-shaped slot 152 to the relatively longer L-portion 145. Once the fastener 145 transitions to the relatively longer L-portion 145, the driven blade 46 is enabled to move separately from the blade guard and vice versa.
  • the biasing element 88 may cause the driven blade 46 to be returned to the ready position, in turn shifting the blade guard 50 along a reverse shifting direction (opposite the shifting direction 149) and into common movement with the driven blade 46 as the driven blade 46 returns from the cut position, through the driven blade's intermediate position to the ready position.
  • the biased blade 48 may be spring-biased back into the driven path 47 via the biasing members 110.
  • the present invention provides a cutting mechanism 34, 40 for a dunnage conversion machine 20 that selectively cuts dunnage sheet stock drawable through the cutting mechanism 34, 40.
  • the cutting mechanism 34, 40 includes a frame 42, a driven cutting means 46, 82 supported relative to the frame 42, and a self-adjustable cutting means 48, 92 also supported relative to the frame 42.
  • the self-adjustable cutting means 48, 92 is arranged to self-adjust its position relative to the driven cutting means 46, 82 to account for wear of at least one of the driven cutting means 46, 82 and the self-adjustable cutting means 48, 92.
  • the driven cutting means 46, 82 and the self-adjustable cutting means 48, 92 are engageable with one another to cut the sheet stock drawable between the driven cutting means 46, 82 and the self-adjustable cutting means 48, 92.
  • a guarding means 50 is arranged to project beyond a driven cutting edge 82 of the driven cutting means 48, 82 to restrict movement of the driven cutting edge 82 beyond an outer periphery 130 of the guarding means 50 until the driven cutting edge 82 is within a predetermined distance from a cutting edge 92 of the self-adjustable cutting means 48, 92.
  • the present invention provides a cutting mechanism 34, 40 for a dunnage conversion machine 20 that selectively cuts dunnage sheet stock 24 drawable through the cutting mechanism 34, 40.
  • the cutting mechanism 34, 40 includes a frame 42 and a pair of opposed cutting blades 44 through which the bulk supply of dunnage 24 is drawable.
  • the cutting blades 44 include a driven blade 46 and a biased blade 48, each supported relative to the frame 42 for movement into and out of contact with one another.
  • the driven blade 46 is movable towards the biased blade 48 to cut the sheet stock 24.
  • the biased blade 48 is biased against movement away from the driven blade 46 to allow for self-adjustability to counter wear of one or both of the opposed blades 44. Contact of the opposed blades 44 with one another causes the biased blade 48 to be deflected away from the driven blade 46.

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  • Making Paper Articles (AREA)

Claims (7)

  1. Schneidmechanismus (34, 40) für eine Garnierumwandlungsmaschine (20), die durch den Schneidmechanismus (34, 40) ziehbares Garnierbogenausgangsmaterial wahlweise schneidet, wobei der Schneidmechanismus (34, 40) Folgendes umfasst:
    einen Rahmen (42), der gegenüberliegende Klingen (44) zum Schneiden des Bogenausgangsmaterials trägt; und
    die gegenüberliegenden Klingen (44), die eine angetriebene Klinge (46), die eine angetriebene Schneidkante aufweist, und eine vorgespannte Klinge (48) beinhalten, die eine vorgespannte Schneidkante (92) aufweist, die relativ zueinander bewegbar sind, wobei die angetriebene Schneidkante (82) über einen Bogenausgangsmaterialpfad (49) hinweg bewegbar ist, entlang dem das Garnierausgangsmaterial zwischen einer Bereitschaftsposition und einer Schneidposition bewegbar ist, die von der Bereitschaftsposition entfernt und in Berührung mit der vorgespannten Schneidkante (92) ist, und wobei die vorgespannte Klinge (48) in Richtung der angetriebenen Klinge (46) vorgespannt ist und jeweils die angetriebene Schneidkante (82) und die vorgespannte Schneidkante (92) lineare Kanten sind;
    wobei die vorgespannte Schneidkante (92) über einen Bewegungspfad der angetriebenen Schneidkante (82) hinweg vorgespannt ist, wenn sich die angetriebene Schneidkante (82) in der Bereitschaftsposition befindet; und
    wobei die Berührung der angetriebenen Schneidkante (82) mit der vorgespannten Schneidkante (92) eine Bewegung der vorgespannten Schneidkante (92) aus einem Bewegungspfad der angetriebenen Schneidkante (82) bewirkt; dadurch gekennzeichnet, dass die vorgespannte Schneidkante (92) in Richtung der angetriebenen Schneidkante (82) derart schwenkbar vorgespannt ist, dass die Berührung der gegenüberliegenden Klingen (44) miteinander an einem Scherpunkt auftritt, der eine Kantenlänge der vorgespannten Schneidkante (92) durchquert, wenn sich die angetriebene Schneidkante (82) zwischen der Bereitschaftsposition und der Schnittposition bewegt, um das Bogenausgangsmaterial zu schneiden.
  2. Schneidmechanismus (34, 40) nach Anspruch 1, wobei die angetriebene Schneidkante (82) in Richtung der vorgespannten Schneidkante (92) linear verlagerungsfähig ist.
  3. Schneidmechanismus (34, 40) nach einem der Ansprüche 1 oder 2, der ferner einen Klingenschutz (50) umfasst, der zwischen dem Rahmen (42) und der angetriebenen Klinge (46) gekoppelt ist, wobei der Klingenschutz (50) angeordnet ist, um über die angetriebene Schneidkante (82) hinauszuragen, um die Bewegung der angetriebenen Schneidkante (82) über einen Außenumfang des Klingenschutzes (50) hinaus zu beschränken, bis die angetriebene Schneidkante (82) sich innerhalb eines zuvor bestimmten Abstands von der vorgespannten Schneidkante (92) befindet.
  4. Schneidmechanismus (34, 40) nach Anspruch 3, wobei der zuvor bestimmte Abstand kleiner als etwa 5 mm ist.
  5. Schneidmechanismus (34, 40) nach einem der Ansprüche 1 bis 4, der ferner einen Klingenschutz (50) beinhaltet, der zwischen dem Rahmen (42) und der angetriebenen Klinge (46) gekoppelt ist, wobei der Klingenschutz (50) konfiguriert ist, um gemeinsam mit der angetriebenen Klinge (46) zwischen einer Eingriffsposition des Klingenschutzes (50) und einer Außereingriffsposition des Klingenschutzes (50) bewegbar ist, und wobei der Klingenschutz (50) konfiguriert ist, um das Schneiden des Bogenausgangsmaterials und die Bewegung der angetriebenen Klinge (46)von dem Klingenschutz (50) getrennt einzuschränken, bis der Klingenschutz (50) in die Außereingriffsposition bewegt wird.
  6. Schneidmechanismus (34, 40) nach einem der Ansprüche 1 bis 5, wobei die vorgespannte Schneidkante (92) um eine Schwenkachse (96) schwenkbar bewegbar ist, die nahe einem seitlichen Ende (100) der vorgespannten Klinge (48) außerhalb des Pfades (49) des Bogenausgangsmaterials zwischen den gegenüberliegenden Klingen (44) angeordnet ist.
  7. Garnierumwandlungsmaschine (20), die Folgendes umfasst:
    eine Umwandlungsanordnung (26), die das Garnierbogenausgangsmaterial in ein relativ weniger dichtes Garniererzeugnis umwandelt, und
    einen Schneidmechanismus (34, 40) nach einem der Ansprüche 1 bis 6 zum Schneiden des Bogenausgangsmaterials.
EP17717995.9A 2016-04-29 2017-04-06 Schneidemechanismus für eine packmaterialumwandlungsmaschine und packmaterialumwandlungsmaschine Active EP3448639B1 (de)

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US201662329291P 2016-04-29 2016-04-29
PCT/US2017/026309 WO2017189201A1 (en) 2016-04-29 2017-04-06 Cutting mechanism for a dunnage conversion machine and method

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US10940658B2 (en) 2021-03-09
EP3448639A1 (de) 2019-03-06
EP4134213A1 (de) 2023-02-15
US20190091959A1 (en) 2019-03-28
WO2017189201A1 (en) 2017-11-02

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